From 890674343bb2d546825f713542b1e199f0728732 Mon Sep 17 00:00:00 2001 From: Shunyong Yang Date: Tue, 6 Feb 2018 14:37:12 +0800 Subject: [PATCH] ACPI / tables: Add IORT to injectable table list Loading IORT table from initrd can be used to fix severe firmware IORT defects temporarily before platform/BIOS vendor releases an upgraded BIOS binary. Moreover, it is very powerful to debug SMMU node/device probe, MSI allocation, stream id translation and IORT table from firmware. It is also very useful to enable SMMU and devices behind SMMU before firmware is ready. This patch adds ACPI_SIG_IORT to the table, which enables IORT from initrd to override which from firmware. Signed-off-by: Yang Shunyong Acked-by: Hanjun Guo Signed-off-by: Rafael J. Wysocki --- drivers/acpi/tables.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c index 80ce2a7d224b..7bcb66ccccf3 100644 --- a/drivers/acpi/tables.c +++ b/drivers/acpi/tables.c @@ -456,7 +456,8 @@ static const char * const table_sigs[] = { ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA, ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT, ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT, - ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL }; + ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, ACPI_SIG_IORT, + NULL }; #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header) -- 2.11.0